Quotables
"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 4276584 | Automotive headlight An auxiliary automotive headlight intended to secure the visual range in fog, rain, and snow. The filament of the lamp bulb is placed horizontally at the focus of a reflector in the shape of a paraboloid of revolution. At the front of the reflector there ... | 06/30/1981 |
| 4234912 | Luminaire for residential roadway lighting A luminaire for roadway lighting using a one-piece reflector developing at least two collimated beams in each longitudinal direction. The collimated beams impinge on sloping faces of a refractor to diverge the beams into a regular pattern covering the str... | 11/18/1980 |
| 4234906 | Photoflash unit having light-refractive prisms A photoflash unit having one or more flash lamps, and a transparent cover in front of the flash lamps which is provided with elongated light-refractive prisms in front of each flash lamp so as to refract directly radiated light from the lamp when flashed ... | 11/18/1980 |
| 4214297 | Arrangement for spectral dispersion of a bundle of light The invention is in concern of an arrangement for producing artificial rainbows, particularly for use in planetaria, in which a bundle of light emitted from a light source and directed through an aperture upon a prism is dispersed by the latter and reflec... | 07/22/1980 |
| 4180849 | Pedal cycle headlamp A transparent lens for the front of a pedal cycle headlamp has a first set of elongated prisms arranged to extend horizontally and thereby modify the transmitted light distribution in the vertical direction and a second set of elongated prisms arranged to... | 12/25/1979 |
| 4177505 | Indicator light with incorporated catadioptric element for automobile The present invention relates to an indicator light, particularly for an automobile, comprising a catadioptric element such that its position in the light and the preferred orientation of certain of its catadioptric prisms allow a zone adjacent the zone n... | 12/04/1979 |
| 4172273 | Multiple flash unit with light-spreading protective shield A prismatic protective shield for each flash-lamp and reflector combination as arrays of parallel prisms in order to level the light distribution with a tendency to produce an intensity dip at the pattern center. Arrays of horizontal prisms occupy a centra... | 10/23/1979 |
| 4164010 | Illuminated bank window A bank window of the type mounted in the wall of a bank building and having a large window and a movable drawer through which bank transactions may be made so constructed as to provide a light source along the upper edge of the window frame which casts li... | 08/07/1979 |
| 4161770 | Guide signal devices A device for producing an optical guide signal is disclosed. This device is particularly suitable for installation in airport runways and comprises a covered housing containing a light source and a prism wherein a portion of the prism projects above the c... | 07/17/1979 |
| 4142179 | Safety warning lamps for adverse or hazardous atmospheres A warning lamp for use in hazardous atmospheres including three air-filled volumes interconnected by a passageway between screw threads whereby, in the event of an explosion, each of the volumes stores a quantity of explosive gases prior to permitting esc... | 02/27/1979 |
| 4118763 | Variable transmission prismatic refractors Luminaire globe has external prisms formed to provide controlled amount of emitted light in various portions of the globe. The prism comprises a combination of right angle reflecting surfaces and light transmitting surfaces contoured to provide the desire... | 10/03/1978 |
| 4080529 | Combination clearance and side marker lens A combination clearance and side marker lamp comprising a generally rectangular housing having a base wall and a peripheral wall surrounding the base wall and having side portions and end portions. Longitudinally spaced light bulbs are mounted within the ... | 03/21/1978 |
| 4071750 | Light diffuser and lamp incorporating the same A lamp includes a light source having a center and a light diffuser disc having two opposite faces and supported at a distance from the light source. One face of the light diffuser disc is provided with a prism structure which is symmetrical with respect ... | 01/31/1978 |
| 4053762 | Twin-beam luminaire lens A luminaire lens is provided with a prism arrangement which emits light in two beams. A two-light tube fixture is utilized with approximately the same amount of light coming from the 0° to 30° zone of candlepower distribution and the 30° to 60° zone o... | 10/11/1977 |
| 3988609 | Lighting panel and luminaire using it Luminaires equipped with an improved high efficiency, wide light distribution lighting panel provide more favorable ESI values and may be spaced farther apart than conventional ones. The lighting panel includes three bands of conical prismatic elements; t... | 10/26/1976 |
